ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTRBGCZEEHUPLSKBAHRIS..MTNORS......................JDIM360 Ver 2.15 (14 Jul 2008) - 1620000/01970678EUROPEAN PATENT APPLICATIONA320101229EP08150848.32008013020080130enenen68576520070314US2010122920105220080917200838G01F 11/28 20060101AFI20080812BHEP G05D 7/06 20060101ALI20100531BHEP deVerfahren und Vorrichtung zur Bereitstellung konstanter Flüssigkeitsraten und zur Ausgabe präzise wiederholbarer FlüssigkeitsmengenenMethod and apparatus for providing constant liquid rates and dispensing precisely repeatable liquid volumesfrProcédé et appareil pour fournir des débits liquides constants et fournir des volumes liquides répétables précisément1ChemFlow Systems, Inc.101007855SP/2838EP001338 Ridder Park DriveSan Jose CA 95131USHan, Leon2148 Port WaySan Jose, CA 95133USMoulton, Russell D402 Galleria Drive No 12San Jose, CA 95134USPerkins, Sarahet al101150027Stevens Hewlett & Perkins 1, Pemberton RowLondon EC4A 3BGGBATBEBGCHCYCZDEDKEEESFIFRGBGRHRHUIEISITLILTLULVMCMTNLNOPLPTROSESISKTRALBAMKRS20101229201052

Techniques for dispensing a type of liquid in a specific amount or at a constant flow rate are disclosed. According to one aspect of the present invention, a height difference between an inlet and an outlet is maintained by an adjustable tubing assembly. An overflow assembly is provided to divert any overflow of the liquid from entering a reservoir and keep a specific level of the liquid. A valve is provided to the inlet and can be turned off when a sensor detects that there is an overflow of the liquid in the overflow assembly.